Performance tracking issue for 6.6

[ellatrix]

Edit: template previewing is now ⅓ faster for 6.6.

All results: https://docs.google.com/spreadsheets/d/1kQF-SKwanquvdBiKXiJYZKsviRoU256M_tf_-oDd95M

---

It's too early to tell how much we can do, I'll just list the PRs here as they get made.

So far we probably have a -40% for loading templates. I don't think we'll manage to improve other load metrics though.

This issue keeps track of all related PRs.

https://github.com/WordPress/gutenberg/pulls?q=is%3Apr+is%3Aclosed+label%3A%22%5BType%5D+Performance%22

Load (Editor/Preview/Pattern/Templates)

• Templates perf: resolve patterns server side #60349
• Block editor: optimise hasSelectedInnerBlock selector #60330
• Template part: avoid pattern fetch on mount #60297
• Performance: move style overrides to context #60382
• Pattern block: avoid fetching all reusable blocks on mount #60310
• Block preview: build in async rendering #60425
• Previews: avoid unneeded block selectors #60543
• Preview: skip rendering rich text #60544
• Drop zone: avoid media query on mount #60546
• Navigation block: avoid selector + style recalc on mount #60572
• Layout support: avoid two block editor store subs #60612
• Image cropper: remove clientWidth prop with useResizeObserver #60674
• Editor canvas: reduces resize listeners #60682
• useBlockSync: avoid replacing blocks twice on mount #60967
• Core data: getEditedEntityRecord: do not return empty object #60988
• useMatchMedia: cache queries #61000
• Block: remove outline related store selecting #61139
• Perf: batch block list settings in single action #61329

[annezazu]

Heads up to @WordPress/performance as we slowly begin to look towards 6.6. This issue will be kept up to date as performance work continues!

[bridgebrain]

Having an option to disable template previews would be appreciated. They're causing my page to crash every time I go to change templates

[ellatrix]

@bridgebrain We're going to make a lot of improvements for templates this release so I'd hope that fixes the crash. May I ask what theme you have installed? And what device and browser are you on?

[fabiankaegy]

Hi all 👋

Reminder: The release candidate for Gutenberg Version 18.5 is scheduled for next Friday (May 31st). So anything that is supposed to make it into WordPress 6.6 must be merged by then.

Please raise any important issues that need additional attention :)